package com.fxd.springcloud.controller;

import com.fxd.springcloud.entities.CommonResult;
import com.fxd.springcloud.entities.Payment;
import com.fxd.springcloud.lb.LoadBalancer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;
import java.net.URI;
import java.util.List;

/**
 * @auther fuxudong
 * @date 2021/4/26 - 19:15
 */
@RestController
@Slf4j
public class OrderController {

    //    public static final String PAYMENT_URL = "http://localhost:8001";
    //根据服务名称找，不能写死，且该服务具备负载均衡功能了
    public static final String PAYMENT_URL = "http://CLOUD-PAYMENT-SERVICE";

    @Resource
    private RestTemplate restTemplate;

    @Resource
    private LoadBalancer loadBalancer;

    @Resource
    private DiscoveryClient discoveryClient;

    @GetMapping("/consumer/payment/create")
    public CommonResult<Payment> create(Payment payment) {

        //参数一：调用的地址
        //参数二：参数
        //参数三：结果集
        //postforobject，返回对象为响应体转化的对象，基本上可以理解为json
        return restTemplate.postForObject(PAYMENT_URL + "/payment/create", payment, CommonResult.class);
    }


    @GetMapping("/consumer/payment/get/{id}")
    public CommonResult<Payment> getPayment1(@PathVariable("id") Long id) {
        return restTemplate.getForObject(PAYMENT_URL + "/payment/get/" + id, CommonResult.class);
    }

    @GetMapping("/consumer/payment/getforentity/{id}")
    public CommonResult<Payment> getPayment2(@PathVariable("id") Long id) {
        //getforentity,返回对象为responseentity对象，包含了响应中的一些重要信息，比如响应头，响应状态码，响应体
        ResponseEntity<CommonResult> entity = restTemplate.getForEntity(PAYMENT_URL + "/payment/get/" + id, CommonResult.class);
        if (entity.getStatusCode().is2xxSuccessful()) {
            return entity.getBody();
        } else {
            return new CommonResult<>(444, "操作失败");
        }
    }

    @GetMapping("/consumer/payment/lb")
    public String getPaymentLB() {
        List<ServiceInstance> instances = discoveryClient.getInstances("CLOUD-PAYMENT-SERVICE");
        if (instances == null || instances.size() <= 0) {
            return null;
        }
        ServiceInstance serviceInstance = loadBalancer.instances(instances);
        URI uri = serviceInstance.getUri();
        System.out.println(uri);
        return restTemplate.getForObject(uri + "/payment/lb", String.class);
    }

    @GetMapping("/consumer/payment/zipkin")
    public String paymentzipkin() {
        return restTemplate.getForObject("http://localhost:8001" + "/payment/zipkin", String.class);
    }

}
